- Reaction score
- 5 to 10 years
So I'm working on the substrate layer of my 33 gallon build and as I'm about to open the bag of gravel to cover my enriched base, I see that the stone has a polymer coating. What the heck is that for! Did I just spend good money on a lousy product? I've never seen this on any of my other substrates before so naturally I'm reluctant to put it in my tank. Any of you ever researched this before?